What is the Source Map Downloader?
When code is minified, a source map links it back to the original readable source. Browsers use it for debugging. The minified file points to it with a sourceMappingURL comment or a SourceMap header.
This tool checks up to 25 scripts and stylesheets on a page. For each one it tells you if a map is linked, if the map is public, and how many source files it contains. You can download all public maps as a ZIP. Site owners can use it to see if they are sharing more code than they meant to.
How to use it
- Paste the address of the page to check.
- Press Find source maps.
- See each JS and CSS file and its source map status.
- Download all public maps as a ZIP.
Why people like this tool
Clear status
Public map, inline map, linked but blocked, or no map.
Header support
Reads SourceMap and X-SourceMap headers too.
Source count
See how many original files each map includes.
Security view
Quickly spot public maps on private apps.
